简易的时间锁。
通过循环置顶实现锁定，默认密码在代码中。
初次运行请小心。-Summary of time-lock. Top realize through the cycle of lock, the default password in the code. Please be careful initial run.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002025s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.103617s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.004759s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002067s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001141s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005539s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001180s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006586s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.024815s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001071s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 112398 [ RunTime:0.023175s ]
